| 3种赤潮藻对褶皱臂尾轮虫的急性毒性效应 |
| 摘要点击 3081 全文点击 1748 投稿时间：2007-11-22 修订日期：2008-01-23 |
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| 中文关键词 赤潮微藻 急性毒性 褶皱臂尾轮虫 密度 |
| 英文关键词 red tide microalga acute toxicity Brachionus plicatilis density |
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| 中文摘要 |
| 应用急性毒性试验方法,研究了可控生态条件下不同密度的东海原甲藻(Prorocentrum donghaiense Lu)、赤潮异弯藻 (Heterosigma akashiwo Hada)和塔玛亚历山大藻(Alexandrium tamarense Balech) 对褶皱臂尾轮虫（Brachionus plicatilis）的致死率和种群增长参数的影响. 结果表明,东海原甲藻、赤潮异弯藻和塔玛亚历山大藻对褶皱臂尾轮虫24 h的LC50分别为3.56、 1.21和0.49 (×104 cells/mL); 3种赤潮藻在对褶皱臂尾轮虫的致毒过程中均表现了明显的密度效应; 104cells/mL的东海原甲藻藻体，105cells/mL的赤潮异弯藻滤液和藻内容物以及103 cells/mL的塔玛亚历山大藻滤液、藻内容物和藻体对褶皱臂尾轮虫有显著的抑制效应,且抑制作用随藻密度的增加而增强. |
| 英文摘要 |
| Acute toxicity testing method was used to study effects of different density of Prorocentrum donghaiense, Heterosigma akashiwo and Alexandrium tamarense on mortality rates and population growth parameter of Brachionus plicatilis under controlled experimental conditions. Results showed that 24 h LC50 values of Prorocentrum donghaiense, Heterosigma akashiwo and Alexandrium tamarense treatment to mortality rate of Brachionus plicatilis were 3.56, 1.21 and 0.49 (×104 cells /mL) respectively. Marked density effects were presented when three species of red tide microalga showed their toxicity to Brachionus plicatilis. There were significant inhibitory effects on Brachionus plicatilis when it was exposed to cells of Prorocentrum donghaiense at the concentration of 104cells/mL, filtrate and cell contents of Heterosigma akashiwo at the concentration of 105cells/mL, and cells, filtrate and cell contents of Alexandrium tamarense at the concentration of 103 cells/mL respectively. Inhibitory effects of three species of microalga on Brachionus plicatilis were enhanced with increasing of microalgal density. |
